Here's what to know about Mike Lynch, the tech tycoon missing in the Sicily yacht disaster

Mike Lynch, once hailed as "Britain's Bill Gates," is now among the six people missing after his luxury yacht sank in a violent storm off the coast of Sicily. At the time of the disaster, Lynch had been trying to shake more than a decade of legal entanglements that ended in June when he was cleared of fraud and conspiracy charges. 

Lynch, 59, rose to prominence in the late 1990s with the development of his software company, Autonomy, which helped businesses quickly find information buried in email and other digital documents. In 2011, Lynch sold the business to Hewlett-Packard for $11 billion, giving him a $800 million payday and cementing him as one of the U.K.'s richest people. 

But the acquisition was later called one of the "most notorious failed mergers and acquisitions" after HP discovered alleged accounting issues, leading to Lynch's firing by HP's then-CEO, Meg Whitman. HP claimed that Autonomy had used accounting improprieties to bolster its underlying financials ahead of the acquisition, charges that Lynch steadfastly denied.